Which of the following is a safety precaution for handling radioactive material? a. remove all metal before entering the containment room. b. store radioactive material in a shielded container. c. remove yourself from the radiation every 15 minutes to prevent accumulation. d. turn on magnetic containment before handling radioactive material to deflect the radiation away from you.

Remove yourself from the radiation every 15 minutes to prevent accumulation.

Explanation:

Answer for Educere/ Founder's Education

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally